Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f675e7e30a4beb3614ebfb8ffa1744055212a84013d0794fc3388f1e8685c93' 
  AND token = 'DY+Bis7YLojIn7UkJdTVCBCcimpncv1kgGPABsMsWdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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