Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '372dbaae925c32de299c84bc7ffea9f3cc121caaa3e0d2e289dae7e2c1ef802d' 
  AND token = 'kDis8d6J9qPkngbDo+3XQk9lzBCh1d/locCWzSVVrxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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