Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90bed7e6bb889c7d820f0e167e73c4b94afb18ba724a152057b4c929570c880e' 
  AND token = 'VCWj5Y63DckHW5Mb/vg5UPkjRsD+eIYd9GKcYzNXxf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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