SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bdaec67bda55904be8619bae0ef98702895761b3c439e198c716c56ed82db5f' 
  AND token = '95Uv8qoIP79L62AJ7hQoZgKHlF+ZJE+0HZXAaBjtG3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

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