Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9c48639d7e0309294c60d00acdf4c12c87d547233702fafef87fb51f4190e51' 
  AND token = 'VOHLzUMCPNBqUS0oypVBOfRCDwuOrvfff4/VM56FfzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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