Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b227a4d993a788f12adc4062ba54c2ae323e87379b7622c4b1d1e1513a48f38' 
  AND token = 'yBz+8fuv1Go9lccIw3/vwN7WIjVcbOzsCeG30SQet68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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