Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e825b0ca888cb4808a8beb2b7703ea7332f3647e3dad90f698127b5e73c4791' 
  AND token = 'PZpLAxOFDvVgle12IS5I6jvXjFRKfMquN2RX451rkTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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