Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8586d675053d115338723935f93f0fae5a0566cf31293b8e93b678343f6e40e4' 
  AND token = 'Zez9Ebbi9rnPOnXBhd/swmyS5Py6mpLKsbWGbEwwQ2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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