Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '742de4f88f8d260383e495ea3e54e1cf7692ef86475755e7d451ed464d848114' 
  AND token = 'Hwvwli8EWXJ3PI6M831vKQAbTtLUiS+vUVZi+Yiqg/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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