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SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (
    12650, 12649, 12643, 12640, 12647, 15800, 
    12639, 12641, 12638, 12637, 12634, 
    12635, 12636, 12654, 12653, 12652, 
    12656, 12655, 12646, 12631, 12998, 
    12997, 12996, 12995, 10826, 10825, 
    10824, 10823, 10822, 10821, 10820, 
    10819, 10818, 10817, 10816, 10815, 
    10814, 10813, 13044, 13043, 13042, 
    13041, 13040, 13039, 13038, 13037, 
    13036, 13035, 13034, 13033, 13032, 
    13031, 13030, 13029, 13028, 13027, 
    13026, 13025, 13024, 13023, 13022, 
    13021, 13020, 13019
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}