Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '83b9f79c8c9dcce56c21fefb6bf1acebde3c22e6bddc9301c578b32aa3693d52' 
  AND token = 'nRK7qZaG5fAd8h9C3Uyubylj3cI3zgEWek6WlVO7Vvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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