Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f21bad981bde260cf35792b621378ed5864393fda63d0fc92d979be962e0cc9' 
  AND token = 'RIFyn+O3xdTo9DZocokKnwKZ6dwfE30L7o2tksEgwsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}