Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05183f49d84bcaa5d70dab826e8f48c5f7231ee9ce55b32915c0d0f38db1a9a0' 
  AND token = 'XCyfzkOPZOS1Pq/Y+PpegZHUyKajB5ad4H6dmU/IgCM=' 
  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"
    }
  }
}