Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818db5d7d1e941d2875f65eb8a87b42477d2b58a086ac791180cac0f6721e5f7' 
  AND token = 'S+4clz5i8KizSrF3pm2OcukT5ZCTUBCHJPEN63+Z9sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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