Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c1e30cbcdc2539b9333f1c420f94e80542cfea02218cb54b4253486b5bf9b400' 
  AND token = 'eA7h5z5dlRXhKMS7sJGoydpAyDNZGL+oTPQ/e8ny7Gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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