Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c60f48336a709cfdc7076ef26ca1692a2c950cc14a10ffb6ea7f8815aab22ed7' 
  AND token = 'lwjM/DB4hZbcyG/sA/dR7E2nk5Iu9rxBDmaJDB6+CME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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