Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c326ca5eca86a897bd7afc52268a4203742b2c23f9952d08829db9a651c1675c' 
  AND token = 'tItimtmCQH4AvHj0G0HqyOjGMYc9DfxXgSVOmHj1FNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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