Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7801667ab05bc165824850499afc4ff786e87cbb7b64115b6f5221c3c98d1593' 
  AND token = '6MsJMS9PQ6ATlw0SJTigt4+H2AWvWB7XQ+twa8i52cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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