Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d6439fe832105ec170a5da7db9b0ba18cfbdcbf9885eb88ceac7eb48e50f397' 
  AND token = 'j668IVMFTO1fOJm9eLLNeT2WxgZOSuWQ9cAeqROLlGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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