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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 (
    10456, 10455, 12702, 10446, 12579, 12580, 
    12700, 10444, 10443, 10442, 10441, 
    10440, 10439, 10438, 10437, 10436, 
    10435, 10434, 10433, 10432, 10431, 
    10430, 10429, 10428, 10427, 10426, 
    10425, 12564, 10424, 10423, 10422, 
    10421, 10420, 10419, 10418, 10417, 
    12856, 10416, 10415, 10414, 12855, 
    12854, 12853, 10412, 10411, 10410, 
    10409, 10408, 10407, 10406, 15781, 
    10405, 10404, 10403, 10402, 10401, 
    10400, 10399, 10398, 10397, 10395, 
    10394, 10393, 10392
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00027

JSON explain

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