Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e5f3c85926dee3c3baa7164b568a0839f330a2cf289adbbc283b4ede8b88b5e5' 
  AND token = 'bQkdGecTRLsRrFaTC0+VogA/rnn/auxvL+dsruXe0ZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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