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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 (
    88194, 88192, 88190, 88189, 88188, 88186, 
    88185, 88137, 88136, 88135, 88054, 
    88053, 88052, 88051, 88050, 87782, 
    87781, 87697, 87696, 87695, 87694, 
    87581, 88552, 88551, 88550, 88549, 
    88548, 88547, 88080, 87985, 88796, 
    88795, 88083, 87879, 87704, 87693, 
    87690, 87587, 87586, 87669
  )

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