SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5ee9260e4049da59adae8c2cf240fca1242028ba797ec1a1aba0fb574c402783' 
  AND token = '+JWav4QiHo5ZwZIBzSKV5Y6KA7XJnTGCLkC2uOomPp8=' 
  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"
    }
  }
}