Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4732a746f37d11a456a079728ff9baec65daf646ee631347cadc8b850fcea307' 
  AND token = '1TqbRrmdqhxIYgo3UYz311srltFf7nQJcXXTsJholGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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