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 (
    33254, 33242, 33256, 33188, 33166, 33156, 
    30927, 30717, 30722, 32940, 30583, 
    30529, 30453, 30452, 30403, 30402, 
    30300, 30294, 30291, 30255
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00037

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
30255 ACTD040,Active Sound Records,Ginex Asiss,Kernnel
30291 OMP007,OMPTraxx,Full-Stomp DJ's,Audio Hedz
30294 EDD057,Emotive Dance Digital,Peters TDJ
30300 YEAH069,Yeah Boi Recordings,Bowie666
30402 AA049,Audio Abuse Recordings,Kye Shand,Strange Dave
30403 AA049,Audio Abuse Recordings,Niall H,Strange Dave
30452 BS002,Basics Hard Music Company,Varo MK
30453 BS002,Basics Hard Music Company,Varo MK
30529 ACTD039,Active Sound Records,Jonathan Leyton
30583 BS003,Basics Hard Music Company,Miguel Aimeur
30717 HNRS033,Hardnoise Records,Nando CP
30722 Chop & Change vs Tranzlinquants, Chogwompa, Blessed Recordings, Jamie R's Power Bounce Rework, Bounce, Hard House, Toolbox Digital Download Chogwompa (Jamie R's Power Bounce Rework) by Blessed Recordings from Toolbox Digital, the UK’s number one outlet for exclusive hard dance, hard trance, hardcore, hardstyle and more. Jamie R, Power Bounce, Chogwompa, Chop & Change, Tranzlinquants
30927 dan020mx,Dance Solution,Bounce Warriors
32940 DNZ107,DNZ Records,Miky One,Dj Kino
33156 LWFHDC14,LW Recordings,Dr Composiv
33166 HNRS034,Hardnoise Records,Dejotalberto
33188 OMP009,OMPTraxx,Audio Hedz
33242 ACTD042,Active Sound Records,Kernnel
33254 DNZ106,DNZ Records,Dj Suko
33256 OMP008,OMPTraxx,Mark HybridZ