Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d5e0ce7bf77f00b72109ce17e5aae6ae7003af226bcb5950291ee90bd2831d8' 
  AND token = 'QQ+KaVK+zefIkkSWAI/mTSfWuNd+vDk/+8lzoTjrlMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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