Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea7cf12ff6e005170c10916223b785436a0443d07d1d754b1ff42337aee11853' 
  AND token = 'zutUmSVsdaOUNWxV/QW5lYmKAzLSSHQirGmYWytdQ3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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