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SELECT 
  pf.feature_id, 
  pf.company_id, 
  pf.feature_type, 
  pf.parent_id, 
  pf.display_on_product, 
  pf.display_on_catalog, 
  pf.display_on_header, 
  cscart_product_features_descriptions.description, 
  cscart_product_features_descriptions.internal_name, 
  cscart_product_features_descriptions.lang_code, 
  cscart_product_features_descriptions.prefix, 
  cscart_product_features_descriptions.suffix, 
  pf.categories_path, 
  cscart_product_features_descriptions.full_description, 
  pf.status, 
  pf.comparison, 
  pf.position, 
  pf.purpose, 
  pf.feature_style, 
  pf.filter_style, 
  pf.feature_code, 
  pf.timestamp, 
  pf.updated_timestamp, 
  pf_groups.position AS group_position, 
  cscart_product_features_values.value, 
  cscart_product_features_values.variant_id, 
  cscart_product_features_values.value_int, 
  abt_filters.filter_id 
FROM 
  cscart_product_features AS pf 
  LEFT JOIN cscart_product_features AS pf_groups ON pf.parent_id = pf_groups.feature_id 
  LEFT JOIN cscart_product_features_descriptions AS pf_groups_description ON pf_groups_description.feature_id = pf.parent_id 
  AND pf_groups_description.lang_code = 'en' 
  LEFT JOIN cscart_product_features_descriptions ON cscart_product_features_descriptions.feature_id = pf.feature_id 
  AND cscart_product_features_descriptions.lang_code = 'en' 
  INNER JOIN cscart_product_features_values ON cscart_product_features_values.feature_id = pf.feature_id 
  AND cscart_product_features_values.product_id = 276686 
  AND cscart_product_features_values.lang_code = 'en' 
  LEFT JOIN cscart_product_filters AS abt_filters ON abt_filters.feature_id = pf.feature_id 
  AND abt_filters.company_id = pf.company_id 
WHERE 
  1 = 1 
  AND pf.feature_id IN (18) 
  AND pf.status IN ('A') 
  AND (
    pf_groups.status IN ('A') 
    OR pf_groups.status IS NULL
  ) 
GROUP BY 
  pf.feature_id 
ORDER BY 
  group_position asc, 
  pf_groups_description.description asc, 
  pf_groups.feature_id asc, 
  pf.position asc, 
  cscart_product_features_descriptions.description asc, 
  pf.feature_id asc

Query time 0.00092

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}