Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c02a0233cf177baa577d5295081aca139938e42e560bad6994f38e96acb667b' 
  AND token = 'TPWmnCc4nAiVJJ/OEiqyuC9hYloW9zOYUa8JUtP5UrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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