Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7093983b0d4cd334c78ac98fbe6edfcc56c2ce559a2b07bae073dd9092d58a5' 
  AND token = 'eW5EsQRWovdPGB9sf1lMLfLT8JaIrUs5qRbEEPk+iF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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