Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '427f78e0d7895866ba36f1b95f0650f1a5f176760eabf127fe46948f5c4c28b7' 
  AND token = 'aoOgy4e6+QWaIs9chGNu7MPNV4Sf1AF+pddxUOjK5MM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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