Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c529f8279d6dfbf58e6c202892048da5eb5f551ef549d44867e7f6a9036de80d' 
  AND token = 'c+T4TsYrQ0FNsk1JOGXuWItfhkA9WeAarWVgKhuEpxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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