Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d91c1e774bd158d8503654af91c9ca89d118bf828bdde429e4febad744f565c' 
  AND token = '0LBz7cPgjq65QnCEXUabM7bGg4URf7bSvaCBJnCGNK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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