Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7109ae88ab4c0be34c1f946a78fb03e698f5b820890e5c2d30d109ffcdac36d6' 
  AND token = 'ONDZcKXYu5R618TJheaoZuJuyHccQjJ+GjUfMitWN94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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