Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30d653e7a98e349617fc49fb7b064082da5dab7b288dfd5a43dbc29ca3cd81f0' 
  AND token = 'wDRgO7hGYrFxoHFDwRZpAyBeMumXkCWBa1uaKRw7H68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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