Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a6b258695733baa8f1c7eab5d25d7544ea2eed13138d0eabb34cc6bd31da999' 
  AND token = 'dtIPRzbSvp5P2H6KPx7NiwqJyezaQwB8ZAahHghv09s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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