Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '300e220833f77188cce0e7a83306ebcd43dff5ae643588beefca2a74fa0df752' 
  AND token = 'yLX3HMiNq0QbCdXvMl8u7WM17xAZbZ8GE2yQE4omrUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}