SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'cca66c2ef59c6bde3e5ef69812a60b7409c1c81d327f0ba287eed82bf89cbab2' 
  AND token = 'VljaNrhjOZC/oWuV3qQq5q52wevlUNYBtBp5f4ftP0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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