Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14b26783903d77dbf6394482660c5170f88a4097ac5d873c600be0f8486c8622' 
  AND token = 'NCCgo92fTnUQKGE4+s0E3c3VobalaX1d2zqXhfvq40w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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