Sandbox

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 (
    95595, 95594, 95593, 95592, 95591, 95590, 
    95589, 95588, 95587, 95586, 95585, 
    95584, 95583, 95582, 95581, 95580, 
    95579, 95578, 95577, 95576, 95575, 
    95574, 95573, 95572, 95571, 94905, 
    95440, 95439, 94679, 94678, 94677, 
    94676, 94675, 94674, 94673, 94672, 
    94659, 94629, 94628, 94626
  )

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