Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '986b02a270d2a16de22af4e629faaa8f68349f050ac037d306dcb992417d66ad' 
  AND token = 'NVrpSNJlNO/XA+NtiWtuHUQymsUOfYfRbZmt1G75p2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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