Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4c9128ae0147649ace42d75d896adcae45ba2f645e513f516bc74758b71e73f' 
  AND token = 'wldkmWUV/1NqZ4nBOVIOqr4UlyefD/6AwJKQ4QILamk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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