Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48b6233fba4c552240dc97e649126538870d4a774c7d24d08a3692a12468663d' 
  AND token = 'W5UXyaB0WFZxsza6udGWOujshB8Uy8axpI5AUblej5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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