Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '655f602ba8d7cd9a9df980d2cbd0da044691b6c61a717ce5a27a4ecfb6f268d8' 
  AND token = 'Nx8CH1i2E3BdhFmnq8ta6NXd/0bDjHW7f6QfOlfd8NA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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