Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dfa40d00e475f00b1cb3b43709e4b444a759f181ac12ea9fa18d303a72dce38' 
  AND token = 'KEgueK6lCM1rWO7aqPhhsr3mqwhOJgu0YeBBtzWRtSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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