Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c47f0f226f8a5d214f73802a459396702e8241eb029a82bd5f90bc0fcc6619c' 
  AND token = 'XxqCwtbgxh/v39BCFkNqBLHUNnURWCMh8EgwyE+NWMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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