Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d2f9f1311644345e5e4a9a87c0bb2163c52957074b31dfc3b733a7e1cd02a60' 
  AND token = 'dtBdWDiBVoPpmdssnHEIi/hrn8seT1KfyqBqzfKjwFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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