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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 (
    89607, 89606, 89605, 89604, 89603, 89602, 
    89601, 89600, 90393, 90163, 90070, 
    90069, 90068, 89588, 89587, 89535, 
    89534, 90287, 89533, 90328, 90327, 
    89543, 89530, 89529, 89528, 89517, 
    89487, 89486, 90303, 90302, 90301, 
    90300, 90299, 90298, 90297, 90296, 
    90295, 90294, 90293, 90292
  )

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