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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da07eaca0ec0f57eefd040a7e5082b7b4f66d1520d9b8eab43ef9baf5fb69cab' 
  AND token = 'R/iBAZQtcfb44rW849XbXIG6zZy3XNJ1WSEU964tduU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}