Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd534c70c607ec1d431c147a66a7cad08639d7b2d5cc66c6037c5c422cc79ed95' 
  AND token = 'KubXIP7J0LSN4KG1pz3nCoXr68lbivN10hO7vjw79X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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