Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '591c4463f4cb23c26dc0eefdfbe7c92821f08722d238cced2862874cb61100fe' 
  AND token = '+SnSm9NHtwh/vmCIjUEHJxEeTGy0mili8iTkKYAWuj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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