SELECT 
  a.*, 
  b.option_name, 
  b.internal_option_name, 
  b.option_text, 
  b.description, 
  b.inner_hint, 
  b.incorrect_message, 
  b.comment 
FROM 
  cscart_product_options as a 
  LEFT JOIN cscart_product_options_descriptions as b ON a.option_id = b.option_id 
  AND b.lang_code = 'da' 
WHERE 
  a.product_id IN (
    421, 427, 408, 382, 418, 400, 424, 381, 
    1529, 401, 1465, 1935, 428, 415, 391, 
    406, 439, 390, 393, 394, 396, 397, 398, 
    399
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position

Query time 0.00302

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "398.41"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "104.00"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "a",
            "access_type": "range",
            "possible_keys": [
              "c_status"
            ],
            "key": "c_status",
            "used_key_parts": [
              "product_id",
              "status"
            ],
            "key_length": "6",
            "rows_examined_per_scan": 104,
            "rows_produced_per_join": 104,
            "filtered": "100.00",
            "index_condition": "((`eshopuga_upgr_4122`.`a`.`product_id` in (421,427,408,382,418,400,424,381,1529,401,1465,1935,428,415,391,406,439,390,393,394,396,397,398,399)) and (`eshopuga_upgr_4122`.`a`.`status` = 'A'))",
            "cost_info": {
              "read_cost": "148.81",
              "eval_cost": "20.80",
              "prefix_cost": "169.61",
              "data_read_per_join": "238K"
            },
            "used_columns": [
              "option_id",
              "product_id",
              "company_id",
              "option_type",
              "inventory",
              "regexp",
              "required",
              "multiupload",
              "allowed_extensions",
              "max_file_size",
              "missing_variants_handling",
              "status",
              "position",
              "value"
            ]
          }
        },
        {
          "table": {
            "table_name": "b",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "option_id",
              "lang_code"
            ],
            "key_length": "9",
            "ref": [
              "eshopuga_upgr_4122.a.option_id",
              "const"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 104,
            "filtered": "100.00",
            "cost_info": {
              "read_cost": "104.00",
              "eval_cost": "20.80",
              "prefix_cost": "294.41",
              "data_read_per_join": "353K"
            },
            "used_columns": [
              "option_id",
              "lang_code",
              "option_name",
              "option_text",
              "description",
              "comment",
              "inner_hint",
              "incorrect_message",
              "internal_option_name"
            ]
          }
        }
      ]
    }
  }
}