Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d28c8feee6f1e06e6033948271bd97a9b574086233ef88efa524335d816050b' 
  AND token = '7Xqe2rEVwXxmDSixkh6F2ytAtVNsZIJoJ2W8J8JXrPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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