Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2f6f8fbd7aa8c8b36a729a9ef1e7396d69f9c0d5b71fa3c6cf9df135a881093' 
  AND token = 'TxomXvx+h1E6wjXBmxTiFohX+qxcOHDmlrfd7SWA4RI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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