Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a810dbb5c514dc43d1e8ef24f8cf13f2eeeff59b13ec733d755bfdef3ee17d4d' 
  AND token = 'COGWwUixWZE+LIH6UeDwAh2EEulxhiTY9BjqQlYz7z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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