Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99daa828ee821c69eac8091c214becde540048db29214362d9310edc1459da62' 
  AND token = 'yyz+fHQ1aLv+TDhBm74ljUnJgCUGAt1326Jr3Hg8Ea0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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