Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '970e577130c90f3261ec206adc680d8b037cd28194161081a421dd9c011d32f7' 
  AND token = '1vokBfHt9vMysqIr2GoV1hPX5/mxcg6LsRNzfHxWxBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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