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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0ed1558f8467401edae919df501fcd66fb6b8e28e5cd085d612cf5c6a80716d4' 
  AND token = '0/m08EiFao1o6//BC8LXaerS+OnB6pAIQsX6e1kwXRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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