SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'daf71eb58fece8195dcdcb9d862dd699210b9d481c96a5d67329125f1140792c' 
  AND token = 'vHz5+gKfwt4fVbT02loEDzlic0zhqjTdQG6lGFFmqrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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