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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'bf949376c6a2b213c61bf44f553729f235c41cbb69e841fe32655642ae8ab560' 
  AND token = '0ZVTvD+7usrrTey3DNMRN9PreP+wym4SsQ6H39C8MhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00151

JSON explain

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