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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '182ff4c512b83d42b1f7f1962622fb11679ecd679797c077ee3077607dcc9f64' 
  AND token = 'GQS8oruwtOUkGBEFS8oV26Kf1ZV4ovuIP2kdu67bkGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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