SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ce42d61ac4498527115430e36759144557772f24b531f093f057bd6c95140d79' 
  AND token = 'F8IyHJjsw/Lv7dY7smA7ylYXgwaFzI4Bwd5icXtDAZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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