SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7187f3138bf1cd3f02d616530d09a2f7f3b39b98ce41f1524dec28f4c716ff9' 
  AND token = 'HOIT4+STzdEmSSbhZ7nk91IH8OzBzfdIuIvFH9scaQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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