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 (
    47488, 47234, 47232, 51280, 47452, 47248, 
    47058, 51278, 47051, 47046, 47045, 
    47044, 47043, 47042, 47041, 47040, 
    47039, 47038, 47037, 47036, 47035, 
    47034, 47235, 47115, 47113, 47112, 
    47111, 47110, 47109, 47108, 47107, 
    47106, 47105, 47104, 47103, 47102, 
    47101, 46931, 46946, 46945, 46944, 
    47214, 47213, 47212, 47211, 47210, 
    47209, 47208, 47207, 47206, 47205, 
    47204, 47203, 47202, 47201, 47200, 
    47199, 47196, 46936, 46876, 46875, 
    46918, 46785, 46746, 46943, 46942, 
    46941, 46940, 46910, 46703, 47010, 
    47009, 47008, 46935, 46929, 46928, 
    46927, 46926, 46688, 46925
  )

Query time 0.00068

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE f ALL idx_group_id 46
1 SIMPLE g eq_ref PRIMARY PRIMARY 3 toolboxdigitalshop_dev.f.group_id 1
1 SIMPLE p ref PRIMARY,idx_group_id idx_group_id 3 toolboxdigitalshop_dev.f.group_id 16 Using where