Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eca1bdcc5647797e1aab10455ba592283d908c81798e264121a96993e2c3f568' 
  AND token = 'AM9WpV7qQtLIiOn7TCC++geDTvnhJj8RBve1CTZgbMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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