Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3185f9842b29f2baa848f1e1c31888fbf87c835d24e757830c4543fdac769dc1' 
  AND token = 'c4cUzouXZRce7WJL9eW3UfdWEWBsUwsFAns6wwBayZA=' 
  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"
    }
  }
}