Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '284643698b54dbc8accdbad3fe79f35bb4b96750d23a341a2a063d3cac9a7956' 
  AND token = 'UncOIz0VWQQcrf9WtZdmKfspfBH8MH7Z4PEgpFlXj9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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