SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afdfacd774abee3b77695db72feb176db483de4565600b9f337d317241314f86' 
  AND token = 'TCicwR+BdkG0RJfODLP/lZdUfYC2M+9c7RztjXvVIiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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