Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c14d019c591264d775a40c413020bc4a345d52d8020298b364bc037f315ec0a' 
  AND token = '5iQQH3t+EC181CnTvK2BnVJzBUyvWEpDkYLhQewhiIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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