Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7d55d025bf0c77583f2d52bfbfda65229fb0617ffb93e95f8a4eb333086aaeb' 
  AND token = 'pdNtBffo5QVZ3dCSjcxHW6rXbGkG2v2LoD/jGbpGAkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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