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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '4fbbfd653c4a04dc88dbe154954db54a94d7f9ab20eee6d2f5b17d69f77bd560' 
  AND token = '4pgTELAiQ5mq00SJRSBOHMbvcxodH9l37y4y6DL8cx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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