Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca037cdae08f0a630f89ccf5cc59edf122face389f33124ddf6d53dd98cd21d9' 
  AND token = '6iZiJytUoDXYITZNBP8Qqk9D2ucTv6ffsLzaC9sAKng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}