Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd07b28bdf689e0738302716ca22aff16ce0a6afa8517cfea0d52b0d97fd92fe5' 
  AND token = 'ZT4g4Xdd6U74X6RsbNcGaM11WxGiG41YTEmKVlR4y78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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