Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85fb4cf5226f1f47e1c7e5f7a6833dfe11f24c575fafd34a0e7fc5b1f1654280' 
  AND token = 'W+EeClrlzNZho4DsGzRaJU/FqyhE8VmRHe+5Ebl82x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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