Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cec64f660144e0a68c96c60ac7e18a3f594cb0358987f60c7ef3cfa5f786e6b' 
  AND token = 'dC09bMTwFLOxdOkPDgf/1+/Dj9jm22G8gLScE9V5Ilc=' 
  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"
    }
  }
}