Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '4aede129cd32b51f192c0876667c88f90af591c37be9a28aaafbb9cc2b28760b' 
  AND token = '6yviyC4lvwIGxSXvgO0BRi0OmUrUqE674XTdHHv4Vb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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