Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ae5e8cffe79121052e49e845a1c6dc1fe7d84a40a272d3cbfce44b60c47b12b' 
  AND token = 'uxJPOb77xiX5sSm7iqNeOa+4ogtMOYQCM/toyIExI0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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