Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23ee844b753c216839fc28870d36b9a64a738954399f245da6fb5e32a6eb585f' 
  AND token = 'PbAvDWWQn3WR8jgW7o6fFe895MGpY5JdrrXjAR+cW0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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