SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f947e17f363bf86c0ba95db108eb3e8bfa8c64b8893bcca144f0719024a26534' 
  AND token = 'v/VXg5v2xxQoPLrJK9BrYZOXljc/k5KI9t11x4DLoZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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