Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24a07d7ee21ffc17788918b7792760cd9aa30dc18b06ef394e463f7aa588afff' 
  AND token = 'NuRNsEdAI34eGpWBW2H1UJtiRyQo6+jWFYjz0uIriM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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