SELECT 
  cscart_abt__ut2_microdata.id, 
  cscart_abt__ut2_microdata.field, 
  cscart_abt__ut2_microdata_description.value 
FROM 
  cscart_abt__ut2_microdata 
  INNER JOIN cscart_abt__ut2_microdata_description ON cscart_abt__ut2_microdata_description.id = cscart_abt__ut2_microdata.id 
  AND cscart_abt__ut2_microdata_description.lang_code = 'en' 
WHERE 
  cscart_abt__ut2_microdata.company_id = 0 
ORDER BY 
  cscart_abt__ut2_microdata.id ASC

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.00"
    },
    "ordering_operation": {
      "using_filesort": false,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_abt__ut2_microdata",
            "access_type": "index",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "id"
            ],
            "key_length": "3",
            "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": "776"
            },
            "used_columns": [
              "id",
              "company_id",
              "field"
            ],
            "attached_condition": "(`s2cart`.`cscart_abt__ut2_microdata`.`company_id` = 0)"
          }
        },
        {
          "table": {
            "table_name": "cscart_abt__ut2_microdata_description",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "s2cart.cscart_abt__ut2_microdata.id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "0.25",
              "eval_cost": "0.10",
              "prefix_cost": "1.00",
              "data_read_per_join": "784"
            },
            "used_columns": [
              "id",
              "value",
              "lang_code"
            ]
          }
        }
      ]
    }
  }
}