Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9b779f1c0df1b47895d74ae4d0867a9844dc8929527c85a6a9ba33ce5c74d790' 
  AND token = 'zL1QIloaILk3bUoNQxlXo/5oBnEeUWpqRRnYsDT/Ins=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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