Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0d60e07f1baa0cd90f3ef6fd3ecd96ea86b823fe48e0a607d83afbd5c304673' 
  AND token = '7LTZSZafb1YWIk3LuZxCIUa7BGtyyPDLk4SBy34zJ6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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