SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25627d563a9561f7f466b498c0cf20e184a9c1947b5406ed7e947cc3535cd2ac' 
  AND token = 'ngXWUjZDqOBZN+ffOLOwpGL4pQCNiExLueiM/KPsb/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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