Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73366e30d5a2b7d2b390b2a6d79cba13086a2059feb1e0fe2fbd5416980712b6' 
  AND token = '3Rx1NQgiTvyTItP/AB0yQ+eiZ23JgRlZqsQ8hLKKcKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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