Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e14f1a71d50a9b602e61aa072392cae724c6c9c3ecbf435c7b9125834c4882a' 
  AND token = 'phpUtYnUG4fs9fFb97yQt1YOmnwitZh2nJy6SPtwTYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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