Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '761e03f6a1accfbc62dc81e05a4e864b964764785b7018b2a942c92ef8eb164e' 
  AND token = 'vUCSKu9N7mt+WxvEPd58Yj7ATrsoEOPVyoJH9Ivk9Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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