Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48df46df667fa63714d8874e581ab05b55c0babbd794d0869de5e1d142c927c9' 
  AND token = 'AhLDen5rWMnVYkUb6QxsIiutOR3jJBsULwjPlOq6nNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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