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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 (
    19860, 19820, 19863, 19865, 19866, 20154, 
    19868, 19869, 19870, 19871, 19872, 
    19873, 19875, 19874, 19876, 20087, 
    19877, 19878, 19879, 19880, 19881, 
    19882, 19883, 19884, 19885, 19886, 
    19888, 19889, 19890, 19891, 19892, 
    19893, 19894, 19895, 19896, 19897, 
    19898, 19899, 19900, 19901, 19902, 
    19903, 19904, 19905, 19925, 19906, 
    19907, 19908, 19909, 19910, 19911, 
    20576, 20088, 20089, 20091, 20092, 
    20093, 20094, 18661, 18662, 19131, 
    18664, 20724, 20725, 20728, 20955, 
    20956, 20957, 20958, 20959, 22277, 
    20971, 21078, 21102, 20972, 20973, 
    20974, 21103, 21923, 21924, 21925, 
    21926, 19867, 20065, 19887, 21749, 
    20723, 20726, 20727
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'ru'

Query time 0.00034

JSON explain

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