Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '853ab3b81e5cfb3e2178d0d55deede5740a1d1d155bcd005d38bcbf76e19cddf' 
  AND token = 'eAezFy/AVU+849+rkJwQqeGk/XwxY1Mkp9cLwDTpeDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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