Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f67612ad6578a152a0173d98db27af1d1be2c95bbb487b9cd2322fcbdb97df0' 
  AND token = 'emYFxhjU+XuWYDPVY5aAAITQNCx96r78UC+VQA3WIqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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