SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '95738b95ee17f9c7c668991968edbcddc34c762d4f8c6611f650e0abcd4bd2f6' 
  AND token = 'ir5GEbjVp/CK23JY5KiygeUTpiOLQrtP1Jg2Fm9BSDw=' 
  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"
    }
  }
}