Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '871b88daa909755130408d9d1a127b5a8b7ca0244627420c50982caec0cc90de' 
  AND token = 'IRFJqJdcxTW20txnYfc48lOtEOyMOCHAk4r74VyN66Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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