Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '376066dfd338fa81d6bad3be9b30492276558817b6cd670c9038630113ecfd5a' 
  AND token = 'jWl47PfyBXBKU9GKdvA8u4hwjd4ngROpP41WFP05GAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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