Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f5278f2b93b559c97c2430dc525f34709afeee9769ae66fce922527d9649265' 
  AND token = 'Y2tYzd5Krxdj4x8D++wBNE5u/rhOY8BNZCH9moSNQZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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