Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25de65f54c30717d1f41cfb6a6bb1a29c205b07ada78ee58afc10d66dcf0ee97' 
  AND token = '+qsy8Y/T7ca+AcTSTA+Pj+k9cYY2OX/yQGaTlYkDTuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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