Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c3ffb1fdb8ef22469204e7e67ba8b89ff74121658cbafba528217ef4c7ac569' 
  AND token = 'Pk5gj3FzkUkrkY0FXI2a4iHvvv4mQSp/4ax68C45x6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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