Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '216050d15bf65779efc6a64c96081d8b8d4348dbcb7553dc1cb468257c293545' 
  AND token = 'f36RDKJza6jgYW1m81l6va4oLj9iEfagziy5RyBKX+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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