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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32495b4e4aac5ca130550264e04060a17debaf0ac7ef93a4c12ca0805fe6c670' 
  AND token = 'lsQAuBG8R+jGCuO+2K1D7goVDoI164k5v83hL9TvTls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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