Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8850b516c86b405144c91b43553fe751efc2cd707d2e3446e27ac215766f5304' 
  AND token = 'WnUfp1ESxwH79jw56BhPToev3FfBRCfhASiOFbzqgak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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