Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '206e44d91dd274a8128645e66ce2b47d8197a0f5013fe5cf6ee1c8aa1fbc2c2d' 
  AND token = 'nN5EjYTHkc0BKWYtxECOBHfy7I8tKVpzIvWdyi5XCL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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