Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606bee8397438bf3c9a393186bf92aa29ff345618837d0e5c669c7a833deb311' 
  AND token = 'Xc2lBcuDzY/Qi5ceDW4tloTZfLSxct9nAkrVguhr2uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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