Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76dccab87c9aa029121a9edb7be1ea0c45aef6b4b3bb19a904dfde815d707e1b' 
  AND token = 'uBC4+allZilAqQQX1ugJcOQk6OxjiZfXleuCU47aPd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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