Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e823b56244ef54821fa29dc59f28d81cbae7e6ec124697f389e6c42790a0736' 
  AND token = 'tO48i/JQjeOBkyCjSZXZQ2VNi9ZSWpz7CcbSCfXVHvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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