Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '327bd464be77f943a92eb034886554790842192e64f083ae1f788ec521462021' 
  AND token = 'BmTczMfmyBW4GxfD7j6dhO/Z25W89yZiIqj0YSsrHgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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