Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17347ac255181decc218c20f2b62b3ae627570c566e7123a78b157cc025373d5' 
  AND token = '27zKWWYJh8BmU1+aUYyTefypJQHWslD0//Sc5wu1lbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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