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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '433c8ae6b69a79e90ad3d4f0c736ddd9859a1141ac5cdf2241c58e5ec567368c' 
  AND token = 'MSzsIbb2oGEWQ+IUUnoVt7NlKGjdDswKAENwPsBgUdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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