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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 (
    67356, 67355, 67354, 67353, 67352, 67351, 
    67350, 67349, 67348, 67347, 67346, 
    67345, 67344, 67314, 67313, 76804, 
    76803, 76802, 76801, 76800, 76799, 
    76798, 76797, 76796, 76795, 76794, 
    67193, 67179, 67178, 67177, 67176, 
    67175, 67174, 67173, 67172, 67171, 
    67170, 67169, 67168, 67167
  )

Query time 0.00027

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