Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03304cc6ef47e0d96e941031cead9807f2eff33b9b5b7952e25b6ebf5128d52b' 
  AND token = 'qmusaTjj9193SPP8t+18orOUoxrigwiw075zUA5WvhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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