Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9dba6fa674638a76b373b4d1d74a4c5638e1180f9df557b8f3093dcffc3cd27' 
  AND token = 'ecpx+nHN5eihLxK6DpcBZZxWjdW9cdnye4fWGaJrmyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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