SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dd5f1cd4a697ba489b524465dcf6f7e2cc6a54f5d9ef60682d5ebb6102da58e' 
  AND token = '4Bw229iszlk4AtaQtAWRgw/FEB7WMvNPIGOVo0MG1ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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