SELECT 
  feature_id, 
  variant_id, 
  value, 
  value_int 
FROM 
  cscart_product_features_values 
WHERE 
  product_id = 10208 
  AND lang_code = 'en'

Query time 0.00118

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 112 Using where

Result

feature_id variant_id value value_int
178 6308
42 145
30 240
23 101
21 96
24 108
127 5895
128 5899
129 5902
19 91 0.500
134 5962
124 0 5702327591883
149 0 5702327591883
20 6292 0.920
152 6105
152 6101
152 6102
152 6100
152 6097
152 6096
152 6095
152 6094
152 6093
152 6092
152 6090
152 6091
152 6106
152 6089
152 6088
22 99