SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05585e609ee85ea587af201e53994b5da23d44333c974b3608d5f3c4b537413d' 
  AND token = 'dWF31B/yNb90675lOwc2uJTH2kINODqwKra3WXNTPtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

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