Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae673f0dc622ef0ebf5bf1a20e07798838c043aa16f074bceafa7c2211b4dfcf' 
  AND token = 'jqfGtcNXN51Ise/nHIcHRjTzOEBSsh97YJW+JzonQyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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