Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ea0a8ee6e5459ccb443ad250171186c33c3ac8e1be3329d1bf8981b4a60418' 
  AND token = 'IPxbDyebRtswlQHRYlbnTgYdBKf4GRWsRGJYjM2m/d4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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