Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fb1efd09ff44c4464f785d1c61b6eab55fbfd420d328ae33e362e4c5e4a8a03' 
  AND token = 's4IjtjIhzhooisoOEYykyHRrYK8tBC562zxG+V88IeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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