SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c177088ffdd1f9750bc0cc98928a9094a5b0e77612ecf5b73d5c6a9bbd2b23ad' 
  AND token = 'H8Jr/ZrUisPK7mUkIwZgm6aYXUfq/E9DjQJnTvYFQn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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