Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aba162c4ee7eaa72bf1bec8bb29bf556e0ea134befa2d4815376936c283d0f0' 
  AND token = 'xfbSh0rtxGH7U2SWwEDZCkd8OXPGH2jKmRHX6y6yTTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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