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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 (
    67662, 67159, 67063, 67062, 67639, 67207, 
    67629, 67628, 67627, 67613, 67589, 
    67514, 66982, 66835, 66813, 65968, 
    67122, 66719, 67363, 67411, 67360, 
    66786, 66785, 66691, 61783, 67303, 
    67302, 67270, 67269, 67268, 67267, 
    67266, 67265, 67264, 67263, 67262, 
    67261, 67260, 67259, 67258
  )

Query time 0.00026

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