Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6da0b0b6ea23d149fcde011b7ad0053b102fe8d4aa65d4a9465771fb0767189c' 
  AND token = 'WobGepXPXp5yCQWVg1xoM7Pp2/n5gzyyXv8c7XmjSAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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