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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 (
    10489, 10471, 9880, 10472, 9885, 10488, 
    9897, 9895, 10467, 9900, 10470, 10466, 
    10477, 9889, 10475, 9890, 10483, 10495, 
    10490, 10469, 9877, 9894, 9891, 10480, 
    9893, 9878, 9886, 9882, 9888, 10482, 
    13091, 12551, 12638, 12634, 12636, 
    12635, 12599, 12627, 12600, 12639, 
    15800, 12595, 12587, 12593, 12620, 
    12623, 12619, 12585, 12616, 12601, 
    12628, 12602, 12640, 12647, 12588, 
    12605, 12606, 12637, 12612, 12613, 
    12641, 12554, 12552, 12642
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00035

JSON explain

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