Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76226a181e9485e147df5cbfb030654bf82fa1fd9ef4882902e600234137ef6e' 
  AND token = '2fXJkgc8z1olqSCVp09lwnHpCUWPvzssTytBlyQfQow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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