SELECT 
  *, 
  cscart_product_tabs.status as status, 
  cscart_product_tabs.block_id as block_id, 
  cscart_product_tabs.company_id as company_id, 
  cscart_product_tabs_descriptions.name as name 
FROM 
  cscart_product_tabs 
  LEFT JOIN cscart_product_tabs_descriptions ON cscart_product_tabs.tab_id = cscart_product_tabs_descriptions.tab_id 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_product_tabs.block_id 
WHERE 
  cscart_product_tabs_descriptions.lang_code = 'en' 
ORDER BY 
  position

Query time 0.00366

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "9.74"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "3.40"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_product_tabs_descriptions",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 34,
            "rows_produced_per_join": 3,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "3.62",
              "eval_cost": "0.34",
              "prefix_cost": "3.96",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "tab_id",
              "lang_code",
              "name",
              "ab__smc_show_more",
              "ab__smc_show_less"
            ],
            "attached_condition": "((`s2cart`.`cscart_product_tabs_descriptions`.`lang_code` = 'en') and (`s2cart`.`cscart_product_tabs_descriptions`.`tab_id` is not null))"
          }
        },
        {
          "table": {
            "table_name": "cscart_product_tabs",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "tab_id"
            ],
            "key_length": "3",
            "ref": [
              "s2cart.cscart_product_tabs_descriptions.tab_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 3,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.85",
              "eval_cost": "0.34",
              "prefix_cost": "5.15",
              "data_read_per_join": "3K"
            },
            "used_columns": [
              "tab_id",
              "tab_type",
              "block_id",
              "template",
              "addon",
              "position",
              "status",
              "is_primary",
              "product_ids",
              "company_id",
              "show_in_popup",
              "ab__smc_hide_content",
              "ab__smc_override",
              "ab__smc_height"
            ]
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "s2cart.cscart_product_tabs.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 3,
            "filtered": "100.00",
            "index_condition": "<if>(is_not_null_compl(cscart_bm_blocks), (`s2cart`.`cscart_bm_blocks`.`block_id` = `s2cart`.`cscart_product_tabs`.`block_id`), true)",
            "cost_info": {
              "read_cost": "0.85",
              "eval_cost": "0.34",
              "prefix_cost": "6.34",
              "data_read_per_join": "761"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ]
          }
        }
      ]
    }
  }
}

Result

tab_id tab_type block_id template addon position status is_primary product_ids company_id show_in_popup ab__smc_hide_content ab__smc_override ab__smc_height lang_code name ab__smc_show_more ab__smc_show_less type properties storefront_id
11 B 8 0 D N 0 N N N 250 en Add to Cart cart_content a:5:{s:8:"template";s:23:"blocks/cart_content.tpl";s:22:"display_bottom_buttons";s:1:"Y";s:20:"display_delete_icons";s:1:"Y";s:19:"products_links_type";s:5:"thumb";s:20:"generate_block_title";s:1:"Y";} 1
2 T 0 blocks/product_tabs/features.tpl 1 A Y 0 N N N 250 en Features
1 T 0 blocks/product_tabs/description.tpl 2 A Y 0 N N N 250 en Description
10 B 116 master_products 3 A N 0 N N N 250 en Sellers of this product products a:1:{s:8:"template";s:58:"addons/master_products/blocks/products/vendor_products.tpl";} 1
3 T 0 blocks/product_tabs/files.tpl 4 A Y 0 N N N 250 en Files
4 T 0 addons/buy_together/blocks/product_tabs/buy_together.tpl buy_together 5 A Y 0 N N N 250 en Buy together
5 T 0 addons/tags/blocks/product_tabs/tags.tpl tags 6 A Y 0 N N N 250 en Tags
6 T 0 addons/attachments/blocks/product_tabs/attachments.tpl attachments 7 A Y 0 N N N 250 en Attachments
7 B 57 product_variations 8 A N 0 Y N N 250 en View all options as list products a:5:{s:8:"template";s:61:"addons/product_variations/blocks/products/variations_list.tpl";s:46:"product_variations.hide_add_to_wishlist_button";s:1:"N";s:23:"hide_add_to_cart_button";s:1:"N";s:36:"product_variations.show_product_code";s:1:"Y";s:44:"product_variations.show_variation_thumbnails";s:1:"Y";} 1
8 T 0 addons/discussion/blocks/product_tabs/discussion.tpl discussion 9 A Y 0 N N N 250 en Reviews
9 T 0 addons/required_products/blocks/product_tabs/required_products.tpl required_products 10 A Y 0 N N N 250 en Required products
14 T 0 addons/ab__deal_of_the_day/blocks/product_tabs/ab__deal_of_the_day.tpl ab__deal_of_the_day 13 A Y 0 N N N 250 en Promotions
15 B 342 addons/warehouses/blocks/availability_in_stores.tpl warehouses 14 A N 0 N N N 250 en Availability in stores availability_in_stores a:1:{s:8:"template";s:51:"addons/warehouses/blocks/availability_in_stores.tpl";} 1
16 T 0 addons/ecl_product_from_other_sellers/blocks/product_tabs/product_from_other_sellers.tpl ecl_product_from_other_sellers 15 A Y 275041 0 N N N 250 en Product from other sellers
17 T 0 addons/ab__video_gallery/blocks/product_tabs/ab__video_gallery.tpl ab__video_gallery 16 A Y 0 N N N 250 en Video gallery
18 B 1301 addons/product_bundles/blocks/product_bundles.tpl product_bundles 17 D N 0 N N N 250 en Bundles with this product product_bundles a:1:{s:8:"template";s:49:"addons/product_bundles/blocks/product_bundles.tpl";} 2
19 T 0 addons/product_reviews/blocks/product_tabs/product_reviews.tpl product_reviews 18 A Y 0 N N N 250 en Reviews