Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50c161712255d6d3d78c9d3eb3f7eb66915986dc2297205986c582cf0db98656' 
  AND token = 'Ti8SkYEffE0glKzPtfb4i9t2pApEr715xxjce61Mr0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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