Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bcf59b7d1e9ff29941bf8b85feb4e35d6e8e11060224665817527a9cc285203' 
  AND token = 'CUBTjqHum3myUT3a2pdPvWZmaZybypJIPyOlyKTgFP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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