Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4ae37a95b8bf789cdd916dd32240161868e744ef77d0d47102b8c7e801fba30' 
  AND token = 'WomnuVtFl/2x5sR/XwxcrKUIPliObxmD14r194RPaMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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