Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba28666a54efc73823ec0150c3189dd080a8ae712d1a2cead38c703cccf416cb' 
  AND token = 'k2/Mmf0/EVhEZOhEmymiaUXw6V7WXrlKhWqVgQFr22c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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