Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '872adf596f1474efe9fa1173253686b1742b6ac73966bc61225ec8db61028b75' 
  AND token = 'n3YyNpPI7KoVmGozfkFtUQnRrd5VIIWg+EMg73Xi5wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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