Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fadaecd12a67fe8308c4ae13e9e7864e083b3733936581da3b56991717d5894' 
  AND token = 'XwQva2zEpBqkrqdWvWcOwJGPZCkfMBpA5Wq4pSK1coc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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