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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aabea00456b61b6a8c56d914f958d6939909a61ddaa11063e7920a81ddc9b052' 
  AND token = 'q8NlzQFQxiHiukilb0T9H+7aKmvsx1IaSlIKBWnlHwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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