Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69e404ab93745dc78de99083b15691753d79bf67026827bcec1333f0c8bf8471' 
  AND token = 'aFMcLDoVzFI8a5Qgp14lWZsR7/hr0UayinLgoGH7BBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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