SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04ca3cc2b30fbb011aad7995ad951a4648fc4fe59d6968820b3cf417f6378a85' 
  AND token = 'GxlqlMKrivOYTrT03FasR6VyEVaMXgnrmVUDggVmUHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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