Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89d6801f210e42e25fb5a9e70ae4f393bca2d4945cd0a028e9324e80fff70694' 
  AND token = 'n/ifjEXEZWZN3Io1rpGVu1IyqJCzN+e7ejbESiYdyjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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