Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fcff8de3ca4b94cf15999202625105b62cea0a830ea427807c47c8fb88b326f' 
  AND token = 'd4CDixr2tZF1NIj/yKa7tChCRsuIewej4ikPv0hraZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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