Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a46a4836cbf07804cf4210ee092a71a234b74eb775bf366eab0da2d45bd236' 
  AND token = 'nvscLG2bBlyEMN124PzNspoosw8fyH9i+7EwC+iQjpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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