SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86fb0905fc2b8468225a37a799265f004a90eb117ebaa15cdd8b49962ede9fad' 
  AND token = 'anHqGGAqw+Zk62qQOZ94ErGWoGc7rsI9vmbSBvaUF8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

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