Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b9e6af5156fca540bd57f63ad0199d15330ca31cbfc3de067b5b7eb01a43d81' 
  AND token = 'gkZ7y5tHupG1g0aF6FbN387/A3KHfQCRvbJ8BmJQQwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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