Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e1565daf1fd03a36c3db023fe343089bd22e744d76179e52124c816ae79b5b5' 
  AND token = '7P/5GafWmrgacTC/YBl8igunAYyLS20YSiRnhPlD2to=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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