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 (
    21604, 21607, 21606, 21602, 21599, 21617, 
    21616, 21611, 21595, 21597, 21578, 
    21596, 21577, 21561, 21562, 21563, 
    21610, 21615, 21601, 21598, 21591, 
    21592, 21593, 21594
  ) 
  AND a.status = 'A' 
ORDER BY 
  a.position

Query time 0.00050

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 (21604,21607,21606,21602,21599,21617,21616,21611,21595,21597,21578,21596,21577,21561,21562,21563,21610,21615,21601,21598,21591,21592,21593,21594) 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": ["admin_test.a.option_id", "const"],
      "rows": 1,
      "filtered": 100,
      "attached_condition": "trigcond(b.lang_code = 'ru')"
    }
  }
}