Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '516aa68b8d285a9cb8bedd93fe188b2d9c86bf0e30e22512f74b23e62bed2e41' 
  AND token = 'LdL/0g5A+pdgj0cxGvLdIkgu3kWQR/FN9ourYnrlwc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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