Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe964661ce721613c05ed09c2568e5b800d166036f7758b6a9a6640eed9a6e9' 
  AND token = 'VsPlSdZ5K9vdP659YQcBDgNXEa/u0jH/eK6bBFt1p3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}