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 = 'ru' 
WHERE 
  a.product_id IN (
    20973, 20974, 20975, 20976, 20977, 20978, 
    20979, 20980, 20981, 20982, 20983, 
    20984, 20985, 20986, 20987, 20988
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "a.position",
        "table": {
          "table_name": "a",
          "access_type": "ALL",
          "possible_keys": ["c_status"],
          "rows": 5,
          "filtered": 100,
          "attached_condition": "a.product_id in (20973,20974,20975,20976,20977,20978,20979,20980,20981,20982,20983,20984,20985,20986,20987,20988) and a.`status` = 'A'"
        }
      }
    },
    "table": {
      "table_name": "b",
      "access_type": "eq_ref",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["option_id", "lang_code"],
      "ref": ["devmotorsbay.a.option_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(b.lang_code = 'ru')"
    }
  }
}