Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29657214b707008318e9992a5166739b13d175b5a9833fd55e5550ea46372214' 
  AND token = 'PYNysQVvLZwAxEpHr0D4xtODJSEagarUAvxml1fhZqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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