Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cfc6e7fe4f8a8fa4ed299b50fe0b394cfeaa0ea8f773753e024f3874a0916cc' 
  AND token = '3JvbN2w4LHvuO3gok0jTRBgyu5avGQaauS6J9FL9J/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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