Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18429ac8dd0c789037596975d7ebd0bc5132357391be0725ea2c0989e5ab5169' 
  AND token = 'qN0Ousw9YxNHP78Jm9gyxNBToMLJaE+VnRwangMz/vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}