Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d28a01f3b7e5d42fafc71bcf30d7de764f2b289231f6d9d74520fe8d7317953' 
  AND token = 'TC7CkS4GbbmKaTSXjGok3umr+A9qhwt70CGzlLVssEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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