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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2dcaf0abc1513b9b50cf1009a6780339eb19ab0a396e0c9ab0a3da62113b5391' 
  AND token = 'TTzkXk7GqPLeKh/lH5o2FsIopHmh9r4qhpsPnKggc2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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