SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dda9ce0f33cca3910d55d3d774df4b8da6fc73c49b9610323910a29a8bfb9fcc' 
  AND token = 'St8YC/yHVnVsNDmPvW/aVIoUP/T8qgqrouDcrrExw4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

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