Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '880d629f69048011234c17e9eeb6e9c44318b24ce3111d01711075de9000e828' 
  AND token = 'n+qipDKdb2rpUZFnl00JvREuDL3tweTlKjvqLbhcli0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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