Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd440f13952439029658d1b8b28553e14bebb35b56413fc0b9467caff1919349d' 
  AND token = 'cbhHJUMp1Lp9Mc5EftpwxhKFyLDKaITL7X15WfvdKkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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