Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c801df811af76066889160426bf02ecdae9185f45d78cd2ad7ad73837e249e' 
  AND token = 'T9FFLlvQIAmxBvOjgHmfhoJ3NC8upp/y1PdbApdxELA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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