SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1ee6401c4c3cf472b1fcd3e9a9f2cf5bfa14b273b83194380983c8bae04e5e17' 
  AND token = 'c0HKZnUQVNWIrf6xXpEbRqVLY7BwX3Z+El8/SZV4o/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}