Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6a82f3f45618c214ab4cf53f8628987e9fbb01557ab43b710a3af7607e9b304' 
  AND token = 'wWRE2d9DN948jCo+7GgRX+139ommLPt7TTTlW2JX5iU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}