Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b981c6008a6dc2dc9ed5b3dc3870ebef67bfb15ff403ff3ebf7fa042a42d069' 
  AND token = '23GTx7mCzv80zG3pfPfqF06dA8rwK9vZqqBXT10vUNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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