Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc91589bbebaac270fb269e73d26c0399ae3ee7e80922b86ac5b36b30fc6a45' 
  AND token = 'le7ZX8SmoaULew44M+wsOsIm8j6xafPz5Ruv4basoW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}