Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8fc52423aca409d84b5fda78a7d5c9de71b948563f4a02b25e0c8a0aab3daff6' 
  AND token = 'OJ8lTRc8RtENOGrycaJbDBb7P8KOi7SvMHmZZ4PfKuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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