Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1461b8baa350ede498600fee7a50552615148914648767db6b4629c973749e89' 
  AND token = 'OgFabDm3PtiLYCI9P2FHkrmotsUcq95EWvmNsewYXNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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