SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '155469c91444cf08f4e11a6d0dff6400821360a555cb921ed253d7b74ed99cd1' 
  AND token = 'EiX7TUBUxKVYEh5ukPjGaJ6Fa/rRpkHwJzJPS/5s474=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00348

JSON explain

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