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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '8a5fefee401cac9b8b9222e0759aa7ef75bfe50f53dc78251f47ae119a32ae3a' 
  AND token = '+W3nFKSsoalxGccK8paOvO9FNmq+uIkZffWvVsq+CPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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