SELECT 
  feature_id, 
  variant_id, 
  value, 
  value_int 
FROM 
  cscart_product_features_values 
WHERE 
  product_id = 3325 
  AND lang_code = 'de'

Query time 0.00049

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 74 Using where

Result

feature_id variant_id value value_int
176 6265
30 6131
135 5967
135 5968
176 6268
42 149
127 5895
128 5899
129 5903
136 5972
136 5976
135 5963
24 107
135 5964
176 6267
176 6269
176 6266
178 6317
176 6272
176 6264