Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b877dcae5dd45f6bc55343a3c97ad05e6d7efa27bd6c04e5fad2e8da331935f' 
  AND token = 'pNp9GVpT3GIywury5ffgwPwGr98Hf6jrX+oheUYuU74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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