Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8801bf0793c06c2e13155665ddf40c81bd6487e5394e799865c84c55a8c02b64' 
  AND token = 'QhzCieSTPWIkTtFBZFcxEPBzs395nsEMKyLdLrLohG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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