Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d70852875a76e37c3ce884d2d038525ed8bda4c3ba77af658cb90c78043fd74' 
  AND token = 'S55Hq0zcA8qptGw/4DaLLd6+kFhuA3oJd28vEkPhEIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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