Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85f0ed09a4a1798467b56319a4bf9c6e93bee547c4661eca9cdaebda72bb9830' 
  AND token = 'qNTjR9ELOr3JatjV4ddIYulq454H2rhdf4BFqe4E70M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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