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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61279a36e995e0721257d1db6fd33a5a9beaf44af167fca9573958d4f1e8e061' 
  AND token = 'NXf4yUjT00FkUJLESba3Y5XqiWZ05CeZcal8sW4lJ84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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