Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '00958d53243efc7521434653d336a0af01512668bd52e5c4af7b449bf8170283' 
  AND token = 'Ob4ymOmWtAd2xohUYemU8mLwPzRkVhuQ2Jw6Cp7EkWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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