SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '833807786c60b4fb35bce6a9b1e0c56569864f42f05a19a61dc160d1c515ef4d' 
  AND token = 'YesFeF3WBMGOO7+hbTb/2KE1A9KCJTZiFpQ7cVhP8xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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