SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40c76a4656360a70b3d0283f788c35e4049e5cb0f978be1ebfa319d4f87dc4f3' 
  AND token = 'gmhIjqHqQBB7A0Vtm4YM7EppX20rLi7h+z6UxYfUigA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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