Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63bf304d3671e8e9a46e58c4eb838df5de1a4d9bab5637bbe3df7ec78fbc5f55' 
  AND token = 'oMd9YvcFu2aPgz/Btu4J9Q7JnE257LR+JwTwPapHgk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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