SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b9f5a70afd98fe367ad1f838d76f99af45ac15a0d450f422e4760a25fb046a3' 
  AND token = 'tOLZRReRV+Snzh8zy9yCjoAY6USBukIBwH1WZlmOGpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

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