Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc319443ea6e74275b2eac1411af337708941f8e9c784c797571e38d959cc3af' 
  AND token = 'sgwIrmLA9OyrgMxRRaPYtndRTXmeSQtjtmu1YUpe3JI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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