Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'febd767c68aa4fce9f43fe30f9bbd8957a239c934304f0d3d49611e984b5889b' 
  AND token = 'ZnLTRuT54P8iVsSrpuOV9ZDmsU38KRbkIJUQyzXOc8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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