Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074b11c9089fc8ce67dd043cb0196bfea722da5fb5f5816668bbb40226f8a3a8' 
  AND token = 'AylJtGl7pPKN1uSXmGaLuDKgLQIxPRs50XKVKnhGy9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

JSON explain

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