Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2028e0d1a4f7acfd07fb5e8a1ac6372903a0e7e6090485bd25d1dad20ad77dcc' 
  AND token = 'ApHWUogbHOabvyr35Sk7I3AiWRjNwFrax9y0WPeTNG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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