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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '8d072ddef393e875fa68d7c7ecc600ba5bfa07f5752883a96b1b6f5fdf2a7706' 
  AND token = 'yJFx6yZbgGHb+PQufg2xsn+ae++1NNyATi8Yp5uWfDo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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