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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '97feba3cbfc8461b157372bf5f38108ee09d108cdd3635f1b1efc8fc4230fcac' 
  AND token = 'knwMZyw7wxDqVG2W2DP7n7OR/WZTozWq22Rz5trdGWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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