Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef94a650e762f00602b1b74e726c4ac1655f5b0305c131551884fb6c8a4fa404' 
  AND token = 'Gls2TI+S/A3QG3gsY2n/7T51zng62OZzt+exsUqezNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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