SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8694b85547c8f3d177d906f9e3505b8238964fbbefeef6cd1ed24cb609e056db' 
  AND token = 'zqVHXoZWpvfju9WtGFQcOHjS/R/5a8Rq0fivFKt4Wdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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