Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73e6014867ec1fd3bef6af527a352cb97ca4cbd497ccccffd45cbae764dee7e0' 
  AND token = 'JuCwnBVFyU46aFMtpTD09cWvK2OHCYeXtP6mWMBC5os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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