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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bbd8bb8c4adf194312b3fd9707b9136517fe1842804b502a84fd202fabc13f0d' 
  AND token = 'FhTbJ41f526f3kuDMy8Y6ZHc4vmaDrGbkP79pHmDQpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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