Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b90f3fb4bcd40ead0ce7a9f3dcd01eab95e38e6ae27972f6fc2732a9aef4058' 
  AND token = 'yIUshAa8VM5pU0FFDKYfRsLUJ6AxHubUxISm9Ht1XFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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