SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '079b2d0581e2547df3ae2f4fd39c466acdcf1a848392a8682eca241e44068d87' 
  AND token = 'uwpw/4MklZHUMV1ql61wK/OyEdCUuB2CkbzQbOHD3eI=' 
  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"
    }
  }
}