Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f821de96d9bc60bcd4654f7dfcf31ca124177a76da7565522d6b296b6ae5f8d' 
  AND token = 'XYbN2P/WZKLYCGxVvbS8cSg4iMk1VbLy2YstKVv+odQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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