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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'da44abd569e1552fba3eb3b1693928cd1b9e9f1ebaeb5dbb26ffd2fe44a60371' 
  AND token = '7jSmUsKoJ+ec7dM7KlQJ8R3kET0MtSv20Ce2wSRyq3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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