SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3317e59a962f18215c1b3473475f4dd52f9a022a7c1ce63ce087ab3e5c795304' 
  AND token = 'Y/O/K0dUZTAWwThvLZVeBy+NKyJ/ttIwfPNsdZRb5jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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