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SELECT 
  v.feature_id, 
  v.value, 
  v.value_int, 
  v.variant_id, 
  f.feature_type, 
  fd.internal_name, 
  fd.description, 
  fd.prefix, 
  fd.suffix, 
  vd.variant, 
  f.parent_id, 
  f.position, 
  gf.position as gposition, 
  f.display_on_header, 
  f.display_on_catalog, 
  f.display_on_product, 
  f.feature_code, 
  f.purpose 
FROM 
  cscart_product_features as f 
  LEFT JOIN cscart_product_features_values as v ON v.feature_id = f.feature_id 
  LEFT JOIN cscart_product_features_descriptions as fd ON fd.feature_id = v.feature_id 
  AND fd.lang_code = 'tr' 
  LEFT JOIN cscart_product_feature_variants fv ON fv.variant_id = v.variant_id 
  LEFT JOIN cscart_product_feature_variant_descriptions as vd ON vd.variant_id = fv.variant_id 
  AND vd.lang_code = 'tr' 
  LEFT JOIN cscart_product_features as gf ON gf.feature_id = f.parent_id 
  AND gf.feature_type = 'G' 
WHERE 
  f.status IN ('A') 
  AND v.product_id = 1137 
  AND f.display_on_header = 'Y' 
  AND (
    f.categories_path = '' 
    OR FIND_IN_SET(603, f.categories_path) 
    OR FIND_IN_SET(557, f.categories_path) 
    OR FIND_IN_SET(734, f.categories_path)
  ) 
  AND IF(
    f.parent_id, 
    (
      SELECT 
        status 
      FROM 
        cscart_product_features as df 
      WHERE 
        df.feature_id = f.parent_id
    ), 
    'A'
  ) IN ('A') 
  AND (
    v.variant_id != 0 
    OR (
      f.feature_type != 'C' 
      AND v.value != ''
    ) 
    OR (f.feature_type = 'C') 
    OR v.value_int != ''
  ) 
  AND v.lang_code = 'tr' 
ORDER BY 
  fd.internal_name, 
  fv.position

Query time 0.00050

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	v	ref	PRIMARY,fl,variant_id,lang_code,product_id,fpl,idx_product_feature_variant_id	idx_product_feature_variant_id	3	const	8	Using index condition; Using temporary; Using filesort
1	PRIMARY	f	eq_ref	PRIMARY,status	PRIMARY	3	hobilifedt.v.feature_id	1	Using where
1	PRIMARY	fd	eq_ref	PRIMARY	PRIMARY	9	hobilifedt.v.feature_id,const	1	Using where
1	PRIMARY	fv	eq_ref	PRIMARY	PRIMARY	3	hobilifedt.v.variant_id	1
1	PRIMARY	vd	eq_ref	PRIMARY	PRIMARY	9	hobilifedt.fv.variant_id,const	1	Using where
1	PRIMARY	gf	eq_ref	PRIMARY	PRIMARY	3	hobilifedt.f.parent_id	1	Using where
2	DEPENDENT SUBQUERY	df	eq_ref	PRIMARY	PRIMARY	3	hobilifedt.f.parent_id	1

Result

feature_id	variant_id	feature_type	internal_name	description	variant	parent_id	gposition	display_on_header	display_on_catalog	display_on_product	purpose
551	1215	S	Araç Marka	Araç Marka	BMW	553	0	Y	Y	Y	find_products
552	1220	M	Araç Model	Araç Model	BMW F02	553	0	Y	Y	Y	find_products
552	1219	M	Araç Model	Araç Model	BMW F01	553	0	Y	Y	Y	find_products
552	1218	M	Araç Model	Araç Model	BMW F18	553	0	Y	Y	Y	find_products
552	1217	M	Araç Model	Araç Model	BMW F11	553	0	Y	Y	Y	find_products
552	1216	M	Araç Model	Araç Model	BMW F10	553	0	Y	Y	Y	find_products
550	1214	E	Marka	Marka	BSG	0		Y	Y	Y	organize_catalog