Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31fc61f5fe29d79d6c9cd5147c8bc48db9a8ace5a48c394330795a1c8253e899' 
  AND token = '/AoJOLqmkz9C5IS560o5OLxGuOXueVndSTjUYGCtYkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}