Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cfa16042313c9a9c00ebc08ba99ad94521b476ef60e4ac52edf62ccbead8d3db' 
  AND token = 'Nes98BDleSSMtWVwTekuEtQo5n9KtMwhf494uczMzw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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