Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a7f7dcf6e6fc28e1bb85bd9a24209476bb9fa22a7b8ee6437dabf0e9a96bd13' 
  AND token = '1ENuS82wxs2EJldv1OFXorohIYDItG0RdZoAHl+BtIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}