Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '483c2490ea3dcbe28e0cf1b5199b8d13a758e15a2d403d2ae1ef1f8a28a70c0a' 
  AND token = 'LtcsQAWC6RnOviVV9dNcPonuy/oP8Ly/LJmb6M8gpq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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