Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c9250121ea3b749222a77ac0d0e18c1b643276cc2d214844e55ee90c0e82ece' 
  AND token = 'ToWkW2lb8yqJhVEUQKZa6iLaDdzWd6YKpXaxO96+PEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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