Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd31445694cbd87cc21df47a95cb13f5abffb13b6b62eea6971de292d8dc7dfa7' 
  AND token = 'KhHdpen9CQhVxSUHtmr2rjiEn2FLTx5ah9Ckkz6I18w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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