Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71c0e7c051181a34839cf5115e1801aec8f6495ac20b60005e4b83858f7cb953' 
  AND token = 'siVM4FymqdyDf4E0TkRjjuDjFzI9CSmFmgsA+DgmBsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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