SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '59d607fa853e27fca2d75ae321c5201b33aa8016bca1dcdba0484a8372df9c43' 
  AND token = 'hC8yUCFaYh+6ZePmKaXZOWyTezvTqVSPvEz5PsgopdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00160

JSON explain

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