Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79dcfed0afacf1870c654bd54ab94b28937c93615527c9b54994e43c8fcdede6' 
  AND token = 'OIqgAjt3qcwKfqMys/u8JAJDddmcW10DlJaQJ8wloFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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