Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7dd44e567a52c09c0c5aca1463974dffb95dc9b2a2e5acbc6af38cfeaa42c7f' 
  AND token = 'fKAWarCjcKfq7HU6xqAYYUM9qrMGbA0fGZh27tyndog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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