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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25768f9e140ef9972fb36cd4206a1e700a469a6c348d40028a3ae74b74df5132' 
  AND token = '/+WEnLJg7UrRFjK7+yEhHaHYG9ZpZmo5/HROn4e44UU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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