Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31770d01b5c8f8874df73d1de63ef3126ea4b0857310c136726a761060003505' 
  AND token = 'WjoJYOSu9Awra988gJMKb/BkiOLOrE8UF1PxI0C0pHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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