Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67216db83bcbad68a36e747336c3cec285bfdf9d990541396e45dbe9194e845f' 
  AND token = '4KpE3jbI/h+Qs2uAAA2f3bttUkbV9qO695A6P4ow77A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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