Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b788cb15fc7b0c63b494baf46be6ebab159c53d8920241af8357613bfc825af' 
  AND token = 'lU3uGni7987l3Z1Ky/OO8f8rWtqfRQXM0PWDfRN8abQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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