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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 (
    73240, 73116, 72858, 72857, 73405, 73404, 
    73403, 73155, 73115, 73351, 73350, 
    73349, 73348, 72836, 73284, 73111, 
    71691, 68825, 49338, 44239, 44238, 
    42033, 73271, 73270, 73252, 73239, 
    73237, 73217, 73156, 73119, 72856, 
    72855, 72852, 72032, 71703, 71486, 
    71485, 71484, 71483, 73020
  )

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