Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d73f0bf7c7c99e2a0311ac2a3bc9fa897c3cac6653585837a17d04b4be64d0' 
  AND token = '2qTTHzA7qla16deCnJKG8N3uGYBSSqqQgqbTnhNwaJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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