Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76b4c83beaf52934a077c1be7dcbfa89ae6867833229c8b307b5bbcd21880762' 
  AND token = 'H1ySoqMUv7FSWt9fxg0Rox9nSbTgxa60XLywNcrcM5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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