Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db2f1d07456ceb0c0afe2e33a94ffb8277ea3a99717f8fc5eef5a61e5bbcc567' 
  AND token = '3HDC/lUQZ56Vpq3TYAav9lB4AZT7WT3d/87Pr508d8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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