Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2c4f6896e58d4c12a4ac1e5f00453a5db8b36d5a98890a989c6f10aa3262516a' 
  AND token = 'qW+pNGKV4Rep3pifJXa8LVievAwf28XpCEAPNvFidG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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