Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35089ba7d6cd0ad92f754ccb44fc402e9140e3e0a0b8ccd03f1d8ab311e50d71' 
  AND token = 'SlOAin/MBnopA+hPuv4G8GaXN8kR0DX6w+xHmYRceso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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