SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'fd11853cd92d77ef0233101e48abed8d43eee489bb8039056c85cf8d35829144' 
  AND token = 'fDWpY/K5oAEiezHWazpQ2TwZM7gj9XnDPVlklS6cggg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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