Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'af5683902ca57e9b2c63f6728e56cfdc6f17f5850fdfede7dde58091ed7a5530' 
  AND token = 'Xu30LJYv7PzebkPPGZXj6ztGRm526EONEv4T94S62a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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