SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0cc36535820e7bd4836b9ece5d0f20b0ffbf0a1019731040224ad8da8a48cd89' 
  AND token = 'mJUhisDwL0Qp7zzbSuj/PDAPW8lUtnWBk+ExBe+RDtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}