SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '587101c16052b566f198f52d71d9e38693177951995f0a6c4c7538647e8ad788' 
  AND token = 'JV05GY75D4l++LaR29N++BcUoOLazNxt/V7Xmf6DsIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables