Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '642c1e57d18c5df612c6b5f651d33b37f0873acb295cb6260ccfbe53fca8c34f' 
  AND token = 'zX/xkGjuHCFDEia07hEEY/+eicIBsubqEYfpzbS/x48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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