Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818cd1acd501d28b190e20c82ab5836c12bb39ec73968cc304d233813fa53e01' 
  AND token = '8GuWEdpWzwJmeJi/V7FtWFg79kMfw/MvJf8n9cSTj6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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