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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aff4c716eb5387ca3ce9cd077fa1842986583e14400249f518be9f921a8c85b3' 
  AND token = '11g3r9Gotyv9zACExWmqImf3+9FJEAoJ1TLHhxFKEeU=' 
  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"
    }
  }
}