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SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    88722, 88721, 88720, 88719, 88718, 88717, 
    88716, 88715, 88714, 88713, 88712, 
    88711, 88710, 88709, 88708, 88707, 
    88706, 89080, 89079, 89078, 88676, 
    88675, 88674, 88920, 88919, 88493, 
    89075, 88916, 88491, 89082, 89030, 
    89029, 89028, 88996, 88995, 88994, 
    88993, 88981, 88520, 88495
  )

Query time 0.00028

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	p	ALL	PRIMARY,idx_group_id				376	Using where
1	SIMPLE	g	eq_ref	PRIMARY	PRIMARY	3	toolboxdigitalshop_dev.p.group_id	1
1	SIMPLE	f	ref	idx_group_id	idx_group_id	3	toolboxdigitalshop_dev.p.group_id	7