Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd875d954a4d237c938a9c9b0cc046857b5d98c72cac26e33ab04ca09d549ecc0' 
  AND token = '0Y1VGgt+GY8ljPcUlbF5qwlBmruWSSY5ZQBFwZxm8ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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