SELECT 
  feature_id, 
  variant_id, 
  value, 
  value_int 
FROM 
  cscart_product_features_values 
WHERE 
  product_id = 9850 
  AND lang_code = 'de'

Query time 0.00134

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_features_values ref lang_code,product_id,product_id_idx,product_feature_idx product_id 3 const 59 Using where

Result

feature_id variant_id value value_int
178 6308
30 240
42 6253
176 6259
127 5895
128 5899
129 5903
135 5963
136 5973
136 5974
24 107
135 5967
124 0 5702326787294
149 0 5702326783791
135 5968
136 5977