Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d1d846c48ab02e32d216c4a7db03d26cba87f3de2a1b8a62e49adb1f918f711' 
  AND token = 'v5zaPe58GX9mB/AK/ygpaplVqakAjrfNEKRIrhqRMAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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