Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b9715fdd626c828d11ea8b8bd27f0873e4dbbf74f51a96ae63048add5939ce6' 
  AND token = 'lNynQibSjSyNeMjUUHHqQwrcEmFEG1wSa8iQkw00WeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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