Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6e924807aa98e1d6965143c54a40c87d098284234856e6aa962c8ed6d2c004c' 
  AND token = 'XCfbbvFk6qrKdagrUdYdVxhVU/PshiO7gvkn6gqzTTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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