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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f885747d6be909a90a07af4f9a0be805501b72f8dc6a48b3b7e2de6c8ef7966f' 
  AND token = 'iY8stgdL6gSf8z7AyXA5lZrdE26eAbvcqpm0arz9CTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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