Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d9739dbbb1e5e67e25072052057dd1f7d5fcdc55cea9d89ec4b5a2dd45ad91e' 
  AND token = 'DC99v01RkEzGyuii0LQ5/leqh9qJLcQ4T4t1lTTuPsU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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