SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d3131ad93db2dcf9ba07a93387f138cc1a8bbe943743269cc8f0dcbf9fc8f58' 
  AND token = 'Zsyb+5Zk0BEJ1MmvZVhcF9u9YhGcQYB9VSZD5le/ROA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

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