Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f50552d7b6c5afc8cc7c8dd9363c520d54d1b989fc5c638eedd4ca512d43ba06' 
  AND token = 'BYTF3O7lD/zRwefSj5RHJcFSfGRxwCpQUSIuq6dcXZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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