SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '7fae9c7665cc8926dcb5075ab34a4b2ac948010f541a057cab6f195c3d78bdb1' 
  AND token = 'hvNQqWcsXf/6tuPD9I0odURsBnkrhj6q+38Su8Go1IQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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