Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf5fcda938859895b393bcf188ae028229c275335d03121da9aba80aae5944cf' 
  AND token = '1laO6QHrggc5AbUdZrZXNEx79wXWh/1FVGwLjfOk9lM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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