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 (
    101603, 101602, 101601, 101599, 101598, 
    101596, 101595, 101594, 101593, 101592, 
    101591, 101590, 101585, 101583, 101582, 
    101544, 102132, 102131, 102130, 102129
  ) 
  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
101544 MQDRFR008,+QDance Records,Oo Sweetman,Ruben Fernandez
101582 LWSHD14,LW Recordings,DJ Veedr,Digital Mafia
101583 LWSHD14,LW Recordings,Pulse Fiction
101585 LWSHD14,LW Recordings,D-Fi,DJ Miss Vixen
101590 LWSHD14,LW Recordings,Ross Homson
101591 LWSHD14,LW Recordings,Munkjack,Damien Blanes
101592 LWSHD14,LW Recordings,Lo Pan,James Nardi
101593 LWSHD14,LW Recordings,DJ Rayne
101594 LWSHD14,LW Recordings,David Morrish
101595 LWSHD14,LW Recordings,Cupra,Kelly Ward
101596 LWSHD14,LW Recordings,Sam E,Filth & Furious
101598 LWSHD14,LW Recordings,Inner City Sumo
101599 LWSHD14,LW Recordings,Ludo
101601 LWSHD14,LW Recordings,Ben Stevens,Tenchy,Pat Glenny,Hayz
101602 LWSHD14,LW Recordings,Damien Blanes
101603 LWSHD14,LW Recordings,Unit DVSN,Boski
102129 HDCRFTL002,Hard Dance Coalition,Matt Capitani
102130 HDCRFTL002,Hard Dance Coalition,Matt Clarkson,Jay Lowe,Rich Resonate
102131 HDCRFTL002,Hard Dance Coalition,Leon Allen
102132 HDCRFTL002,Hard Dance Coalition,Matt Clarkson,Random But Raw