Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d3308878c7e6b4c612a96fd234cf8e82319940d9d606b157ea2598522a57cb0' 
  AND token = 'yNJa0nJAQdb3dXqDGzzmDCgyBIEES3mUt2AIKL5B28E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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