Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41c619842bb15143d5d28dccf6f3373fa0b0fab62dfed1aa98d7c0a929bc1ab8' 
  AND token = 'ok4UKMinVItTi585MVx4F4b2IiHFBLxQfQ9HbnbVK5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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