Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5257e6e74eeda8f4c4f8f1a7cbbe518a78265803c6c8518a59205681679f80ad' 
  AND token = 'KlwSxmkbErYfoGL3RVRFN3LOQHjH0r4b+n83+V5ES6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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