Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f544e5456e129bb7168a74bf2cd04806dcf8d5bd5533c517d15b7bb542beaaee' 
  AND token = 'l9Su5MmGMMpEnIQcwXfigpSFLUkViYJGbCVY10o9suo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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