SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f035505ed6762ac74ae9cb8013a62ca8d55c3a31d2bf4a991b8e21c432e1e7fe' 
  AND token = 'gBdGmfr/l4bKuzGd0BQPsQi2lslh5chJkxqMYV4x8Ro=' 
  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"
    }
  }
}