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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 (
    10734, 10735, 10736, 10737, 10738, 10668, 
    10669, 10670, 10671, 10672, 10673, 
    10674, 10675, 10676, 10677, 10678, 
    10679, 10680, 10681, 10682, 10683, 
    10684, 10685, 10686, 10607, 10608, 
    10609, 10610, 10611, 10612, 10613, 
    10614, 10615, 10616, 10617, 10618, 
    10619, 10620, 10621, 10622, 10623, 
    10624, 9814, 9815, 9816, 9817, 9818, 
    15732, 9820, 9821, 9822, 9823, 9824, 
    9825, 9826, 9827, 9828, 9829, 9830, 
    10241, 10242, 10243, 10244, 10245
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00038

JSON explain

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