Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1493b1a359ee56588e87fff50dd3dccaac0dfaa26ca40e5a6ecc5bb77f1af899' 
  AND token = 'J+l3ZB+X+Zf6DxphwLcvX2Z9WB8GhFNBhepWx+wXGWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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