Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cee7fcd21917b53aa0ba1b9950ce2d6dce1fb60220d6c6cc53ea982926318a10' 
  AND token = '1TZ8Tr6emwtq0FxjZR7aUaxocg7HjTfNgeD8fVlW/XM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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