Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e6446e8c586b4d87c45c189135ca24daa615b257994fd6902d173d8a823a87e' 
  AND token = 'Y6Pno2wqXICjxWo7CcxY1scli3931I5By06bEEqdNgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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