Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2928acf271498f44056a85a772af7be18ed2bcdfafbccc63d12a0cb5f6c592f' 
  AND token = 'Cdk5G/+1gUiIrEZJJmefGU2MyratptXBgkVtBTKV87s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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