SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '630443ee99beaf76381673646258fdc1df559115dfc667829b8f927fd549245b' 
  AND token = 'nU/vXhVxrvwhN7gt+zPYypmvv03dZ/p3HiQokEfH15w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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