SELECT 
  `dispatch`, 
  `value` 
FROM 
  cscart_ab__emd_settings 
WHERE 
  company_id = 3 
  AND lang_code = 'en'

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.65"
    },
    "table": {
      "table_name": "cscart_ab__emd_settings",
      "access_type": "ALL",
      "rows_examined_per_scan": 4,
      "rows_produced_per_join": 1,
      "filtered": "25.00",
      "cost_info": {
        "read_cost": "0.55",
        "eval_cost": "0.10",
        "prefix_cost": "0.65",
        "data_read_per_join": "176"
      },
      "used_columns": [
        "dispatch",
        "company_id",
        "lang_code",
        "value"
      ],
      "attached_condition": "((`s2cart`.`cscart_ab__emd_settings`.`company_id` = 3) and (`s2cart`.`cscart_ab__emd_settings`.`lang_code` = 'en'))"
    }
  }
}