Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a30581dc4cd7a659511eb7a634053b65b42c66368afcba297b62391b924bb89' 
  AND token = 'TpFCsPwxreif5Qvbhd4Ok3ApNtGqpIFH62hGE9Pgq38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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