Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd2fb1d6a3c9804325eb8f68160b5dc78df59f075731a933cc27c753d268ccff' 
  AND token = 'nv4wu3Uy1yQmUQzwOiXLyJRsXJt1XzBam1k+OZb1fQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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