Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '616959a49e17c1494885d0ca24019b06b1d1af6efc15eee14edba8fc835aff7f' 
  AND token = 'HMQUvANImKkAfhcawhg2oMH8BYeiz5CcV+j1W75U6ko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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