Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab0a7e91e03f5b658b4661c5d2de9d2518adb1b5af7b5d9b1efe30886358351e' 
  AND token = 'wvhLT28Z+fRVPlJBiPBi7F7fp4Wx6N6foZuMb7MXSNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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