SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    85913, 85912, 85911, 86694, 85855, 85819, 
    85809, 86655, 86584, 86583, 86582, 
    85751, 85702, 85701, 85691, 86647, 
    85891, 85890, 85889, 85888
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00039

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_descriptions range PRIMARY,product_id PRIMARY 9 20 Using where

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text
85691 FE294,Fatal Energy Records,Samora DJ
85701 TR186,Traffic Records,Casella
85702 PTR112,Power Tracks Records,Jaime Guerrero
85751 Ev226,Evolution Records,Hotchkiss
85809 CheekUDC7,Cheeky Tracks,Starman,Energy Syndicate
85819 CheekUDC7,Cheeky Tracks,Breve,Harmonie
85855 IT040,Infused Traxx,DJ Darroo
85888 LWIBIZA202004,LW Recordings,Indigridient
85889 LWIBIZA202004,LW Recordings,Roger Bonner
85890 LWIBIZA202004,LW Recordings,Remundo
85891 LWIBIZA202004,LW Recordings,Zeni N,Erdit Mertiri
85911 HDB006,Riot Recordings,Beckers,Dino Psaras
85912 HDB006,Riot Recordings,BK
85913 HDB006,Riot Recordings,BK,Anne Savage
86582 DNZF789,DNZ Records,DJ Oskar,Jamie B,Garbie Project
86583 DNZF789,DNZ Records,DJ Oskar,Jamie B,Jay Xtreme
86584 DNZF789,DNZ Records,DJ Oskar,Jamie B,Zero Range
86647 DNZF785,DNZ Records,Schizoofr3nik,DJ Nillos
86655 DNZF790,DNZ Records,DJ Miho
86694 PTR118,Power Tracks Records,DJ Ruiz