SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'b55f7df7174c42e8dc0080f5f6d732dafe7c171b736c5658ebd873c4b662b385' 
  AND token = 'lGCRMFSWuBSBqFmndwMN9G1XV4Q8Av1Puv1mYWty/7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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