Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a4b4f5e8a205deed2d563993db0bd92cf84e94f66d897592770c8ac80d9bf39' 
  AND token = 'HwZZrBtTikbNy82Aw94xlmLry/tbTZyfLdXZdtkjh1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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