Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c6b39189a927862a7eec26b2eff303032a44beb3ce66d34a1393c2cd894ab22' 
  AND token = 'mSmu2401Ifx5MTEbxQjyF9soPedY9DupnB0XDfePT0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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