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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 (
    10068, 10065, 10061, 10050, 10056, 10044, 
    10069, 10066, 12671, 12672, 15779, 
    12673, 12674, 12675, 12676, 12677, 
    12678, 12679, 10024, 10025, 10026, 
    10027, 10028, 10029, 10030, 10031, 
    10032, 10033, 10034, 10035, 10036, 
    10037, 10038, 10039, 10040, 10756, 
    10757, 10758, 10397, 10398, 10399, 
    10400, 10401, 10402, 12700, 10596, 
    10597, 10598, 10599, 10600, 10521, 
    10520, 10519, 10518, 10517, 10516, 
    10515, 10514, 10513, 10512, 10511, 
    10510, 10509, 10508
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00041

JSON explain

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